FXUS66 KSGX 230539
AFDSGX

Area Forecast Discussion
National Weather Service San Diego CA
939 PM PST Fri Feb 22 2019

.SYNOPSIS... 
Very cold temperatures tonight in the mountains where snowpack
remains in place. Otherwise...high pressure near the West Coast 
will bring dry weather with a welcome warming trend this weekend 
into next week with passing high clouds at times.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

...Update...

Another cold night! Big Bear is 7F degrees right now. We are
forecasting 0 there for a low, but it could go below. The last
time Big Bear was 0 or lower was Jan. 14, 2013 when it fell to -1!

The clear sky and dry airmass will allow temps to fall well into
the 30s over the Inland Empire and the inland valleys of San Diego
County with areas of frost likely. A Frost Advisory is in effect
for these areas 10 PM tonight through 9 AM Saturday.

Ready for warmer weather?! It is on the way with gradually
moderating temps into next week. A dry period as well through
month's end. The next rain chance arrives during the first few
days of March.

...Previous Discussion (Issued at 350 PM PST Fri Feb 22 2019)...

It truly is a beautiful day across the region after yesterday's 
relentless winter storm. Temperatures tonight and for the next
couple of nights will be very cold in the mountains where snowpack
remains in place. There will even be some below zero temperatures
likely tonight where the heavy snowpack is in place. Where
snowmelt occurred during the day in the mountains some black ice
could form tonight due to refreezing. 

For the next several days, a welcome warmup and return to SoCal's
famous sunny and mild weather through this weekend. Temperatures 
will rebound to near normal levels with high temperatures in the 
60s west of the mountains and in the high desert through next 
week, and into the 70s by mid next week, with temperatures perhaps
getting close to 80 in the lower deserts, which would be a few 
degrees above normal. 

Weather systems passing by to the north will bring a few periods
of thicker high cloud cover, notably Monday and Tuesday.

The warmest weather of the week will arrive late next week due to
a modest upper level ridge of high pressure Wednesday through
Friday. 

By next weekend a Pacific storm system could bring the next chance
of widespread precipitation to the region, perhaps Saturday or
Sunday March 2-3. 


&&

.AVIATION... 
230430Z...Mostly clear skies with unrestricted vis through Sat night.

&&

.MARINE... 
No hazardous marine weather is expected through Wednesday.


&&

.SKYWARN... 
Skywarn activation is not requested. However weather spotters are
 encouraged to report significant weather conditions.


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...Frost Advisory until 9 AM PST Saturday for San Bernardino and 
     Riverside County Valleys-The Inland Empire-San Diego County 
     Valleys.

PZ...NONE.
&&

$$

PUBLIC...Gregoria (Update)/Brotherton (Prev Discussion)
AVIATION/MARINE...Maxwell